Condenser.



PATENTBD MAY '14, 1907.

I G. A. BACKSTRUM &' P. G. ROESTI.

-CONDENSI-IR.

THE Nomus Fzrzks co., wAsNlNcwN, u. c.

MMA/705%! l M ffm# UNITED sTATEs PAQENT OFFICE.

CI-IARLES A. BACKSTROM AND PAUL ROESTI, OF MILWAUKEE, WISCONSIN; SAID BACKSTROM ASSIGN OR TO BACKSTROM-SMITH STEAM TURBINE 8c MANUFACTURING COMPANY, A CORPORATION OF WISCONSIN.

CONDENSER.

Specification of Letters Patent. I

Patented May 14, 1907.

To r/,Z/ whom t may concern:

Be it known that we, CHARLES A. BACK- sTRoM, a citizen of the United States, and PAUL G. RoEsTr, a citizen of Switzerland, both residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in Condensers, of which the following is a specification.

Our invention relates to improvements in condensers with especial reference to that class of condensers which are used in connection with turbines.

The object of our invention is to provide a form of condenser which may be included within the casing of a turbine and in which the vapor exhaust from the turbine will be effectively liquefied and the liquid as well as the non-condensing vapor removed by means of mechanism driven from the turbine shaft, which preferably is arranged to extend through the condenser.

In the following description reference is had to the accompanying drawings, in which,-

Figure 1 is a detail side view of the exhaust end portion of a turbine to which our invention is applied, the condenser 1 of the running wheel being shown in axial section. Fig. 2 is a sectional view on line X-X of Fig. 1. Fig. 3 is a detail sectional view showing the means for adjusting the supplemental partition-25.

Like parts are identified by the same reference characters in both views.

1 is a turbine casing and 2 the shaft.

3 is the terminal running wheel of a series located within the turbine, and 4 is a nozzle partition through which motive fluid is delivered to the running wheel through nozzles 5. The motive fluid on leaving the running wheel' 3 enters a receiving chamber 6 of the condenser, the lower portion of which chame ber is separated from the remaining portions of the condenser by partitions 7. The motive fluid passes over the partition 7 into the condensing chamber 8 where it is subjected to a spray of liquid which is delivered to this chamber through a series of apertures 9 from an encircling chamber 10. The chamber 10 receives the condensing liquid through a port 11 from any'suitable source of supply and enters the chamber 8 at the top through perforations 9` whereby it is distributed through the vapor from the turbine, causing the latter to condense and fall to the lower portion of the chamber. A centrifugal pump is mounted upon the turbine shaft 2 at the outer end of the condenser. This pump is provided with a series of wings 12 adapted to force the fluid outwardly between diffusion vanes 13 into an annular chamber 14. A

tubular passage 16 leads from the lower portion of the chamber 8 upwardly and along the shaft 2 to the inlet aperture of the pump, the suction of the pump being relied upon to lift the liquid through the passage 16 and deliver it to the blades 12. The inlet aperture of the pump is larger in diameter than the diameter of the passage 16, leaving an annular opening at 17 through which uncondensed vapor and non-condensing gases, such as air, are permitted to enter the pump and be thrown outwardly by centrifugal action with the liquid which enters through the passage 16. The condensed liquid falls to the lower portion of the chamber 14 and is delivered from the condenser through a port 20. The air and other vapor rises to the top of the chamber 14 and is delivered through a port 21. The object of the partition 7 is to keep the condensed liquid from interfering with the running wheels. The object of the suction passage 16 is to provide means for removing the liquid ,before it accumulates to the height of the turbine shaft.

A supplemental partition 25, substantially semi-circular in form, is provided with a collar 26 which encircles a hub 27 on the partition 7, the partition 25 being capable of rotation on this hub. The circular margin of the partition 25 is provided with a segmental rack 28 whereby the partition may be rotated by means ofl a shaft 29 and pinion 30 to close the opening above the partition 7 when starting the turbine. This is done to start the suction fiow of liquid in the passage 16.

Having thus described our invention what we claim as new and desire to secure by Letters Patent is,--

1. The, combination with a turbine; of a chamber formed at one end thereof and inclosing a portion of the turbine shaft; a partition partially subdividing said chamber into a receiving and a condensingcompartment and adapted to separate the lower portion of the compartments; a centrifugal pump mounted upon the turbine shaft in the condensing chamber and having a suction pipe leading to the lower portion of said chamber; together with an exhaust passage leading outwardly from said pump.

2. The combination with a turbine; of a chamber formed at one end thereof and inclosing a portion of the turbine shaft a partition partially subdividing said chamber into a receiving and aY condensing compartment, land adapted to separate the lower portion of the compartments; a centrifugal pump mounted upon the turbine shaft in the condensing chamber and having a suction pipe leading to the lower portion of said chamber; together with an exhaust passage leading outwardly from said pump; and

means for completely separating the receiving and condensing compartments.

3. In a condenser, a condensing chamber provided with inlets for vapor and for condensed liquid respectively; a partition partially sub-dividing said chamber between the vapor and liquid inlets; a movable partition adapted to be adjusted in position to co-operate with the first mentioned partition in completely subdividing said chamber; and a centrifugal pump arranged to dis charge fluidfrom the chamber having a condensing liquid inlet.

In testimony whereof I affix my signature in the presence of two witnesses.

CHARLES A. BACKSTROM. PAUL G. ROESTI.

Witnesses: p

JAs. B. ERWIN, JAMES L. MoNAHAN. 

